Earnings Per Share - Earnings Per Share (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 29, 2013	Sep. 30, 2012	Sep. 29, 2013	Sep. 30, 2012
Earnings Per Share [Abstract]
Net Earnings / (Loss)	$ 6,819	$ 5,917	$ (948)	$ 11,501
Basic earnings per share, Shares	33,696	33,923	33,603	34,017
Equity-based compensation plans, Shares	635	548		571
Diluted earnings per share, Shares	34,331	34,471	33,603	34,588
Basic earnings per share, Per Share Amount	$ 0.20	$ 0.17	$ (0.03)	$ 0.34
Diluted earnings per share, Per Share Amount	$ 0.20	$ 0.17	$ (0.03)	$ 0.33